EP 0097759 A1 19840111 - Barrier anodizing of aluminium and aluminium alloy substrates.
Title (en)
Barrier anodizing of aluminium and aluminium alloy substrates.
Title (de)
Aufbringen einer Sperrschicht auf Substrate aus Aluminium und Aluminiumlegierungen durch Anodisieren.
Title (fr)
Formation d'une couche d'arrêt par anodisation sur les substrats d'aluminium et d'alliages d'aluminium.
Publication
Application
Priority
US 39284082 A 19820628
Abstract (en)
In a barrier anodizing process for an aluminium or aluminium alloy substrate, the anodizing current density is maintained between 20 and 300 ma/cm<2> and the current is terminated after a period of time not appreciably exceeding the barrier formation time. The voltage is preferably maintained between 150 and 200 volts.
IPC 1-7
IPC 8 full level
C25D 11/04 (2006.01); G11B 5/84 (2006.01)
CPC (source: EP US)
C25D 11/04 (2013.01 - EP US)
Citation (search report)
- CH 565871 A5 19750829 - ISOVOLTA
- CH 584767 A5 19770215 - HENKEL & CIE GMBH
- US 4188270 A 19800212 - KATAOKA AKIYOSHI [JP]
- US 4211619 A 19800708 - USBECK GERHARD [DE]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
US 4400246 A 19830823; DE 3371918 D1 19870709; EP 0097759 A1 19840111; EP 0097759 B1 19870603; JP S599194 A 19840118; JP S6230276 B2 19870701
DOCDB simple family (application)
US 39284082 A 19820628; DE 3371918 T 19830201; EP 83100927 A 19830201; JP 8283983 A 19830513